Differential for roving frames and the like



A E 28, 193 6. w. c. STEWART 2,0389%- DIFFERENTIAL FOR ROVING FRAMES AND THE LIKE Filed July 5, 1934 3 Shams-Sheet 1 WALTER C. S EM/2T mam tom WWW 9 I v Apmi 28, l936.- w. c. STEWART DIFFERENTIAL FOR ROVING FRAMES AND THE LIKE Filed July 5, 1954- I 3 Sheets-Sheet 2 WALTER C 5TEWAI2T /NVENTOE A TTOZNEY W 1936. W. c. STEWART DIFFERENTIAL FOR ROVING FRAMES AND THE LIKE 5 Sheet s Filed y 5, 1934 Sheet 3 Patented Apr. 28, 1936 UNITED STATES PATENT OFFIQE DIFFERENTIAL FOR ROVING FRAMES AND THE LIKE 1 Claim.

This invention relates to improvements in the construction of differential gears used in conjunction with the varying motion mechanism required for driving the bobbins of a roving or spinning frame. In the manufacture of yarns from cotton and other textile materials, it is necessary to make a very small roving or strand of cotton for the spinning frame to spin into yarn. This roving as it is called, is made from a large sliver combed from off the carding machine after the cotton has been carded.

Being a somewhat delicate process, to draft, twist and wind these small rovings onto a bobbin, it is necessary to have an arrangement on the machine doing this, that will slow up the speed of the bobbin as each layer is wound thereon, to a speed that will give the same circumference speed as the bare bobbin had when Winding started. The machines that do the above work are called roving frames and have an arrangement of tapered cones with belt connections between them passing through a guide that is moved by a mechanism. Said mechanism is not shown in Figure 1 but is incorporated in all standard makes of roving frames. The purpose of the same is, to vary the speed of a shaft connection by means of a spur gear to a sun-wheel in which is mounted a bevel gear and differential, with its driven. end connecting through gears or chain drive to the shaft by which the bobbins are driven. It is therefore seen that movement of the belt guide or the cone belt causes a variation in the speed of the shaft driving the bobbins.

It is therefore an object of my invention to provide a difierential motion for roving frames and the like in which all parts move in the same direction but at different speeds to produce a proper differential in the roving frame and the the bobbin shaft which form a part of the roving frame.

It is a further object of my invention to provide a differential motion for roving frames in which all the moving parts rotate in the same direction at different speeds so as to secure the proper speed for the bobbin shafts with the minimum amount of power being wasted in obtaining this result, together with means for lubricating the various parts of the machine and retaining the lubricant within the differential housing while the same is being operated.

A still further object of my invention is to provide a dilferential for roving frames and the 55 like mounted in a housing which is free to move and has the minimum amount of friction and also which contains the lubricant therein.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with '5 the accompanying drawings, in which:-

Figure 1 is a side elevation of a portion of a roving frame with my differential applied thereto;

Figure 2 is a longitudinal sectional view taken through my diiferential; 10

Figure 3 is a vertical sectional view taken along line 3-3 in Figure 2;

Figure 4 is a vertical sectional view taken along line 44 in Figure 2.

Referring more specifically to the drawings the 15 numeral l0 indicates the second samson for the roving frame while the numeral ll indicates the first samson and I2 indicates the head of the frame in the first samson. In the first and second samsons is mounted the shaft on which the 20 cone pulley is mounted and also mounted on this shaft is a gear l5. Pivotally mounted on shaft I3 is an arm l6 which has a gear wheel I! mounted thereon, which gear wheel meshes with gear wheel I 5 and also gear wheel l8 on drive' 5 shaft H).

In the lower portion of the first and second samsons l0 and II, is fixedly mounted a shaft 20 which has pivoted arms 2| and 22 thereon. In one end of these arms is rotatably mounted shaft 23 which has cone pulley 24 mounted thereon. Extending between the cone pulleys l4 and '24 is a belt 25 which has a belt rack or shifter 26 in engagement therewith for the purpose of guiding said belt on the cone pulleys for regulating the speed of shaft 32. Shaft 28 has fixedly mounted thereon a pinion 2'! which engages a pinion 28 fixedly mounted on shaft 23. The pinion 21 is integral with a sleeve 29 on the end of which sleeve is mounted a pinion 30 which engages a pinion 3! which is fixedly mounted on shaft 32, said shaft 32 having fixedly mounted thereon a sprocket 33.

The main drive shaft I9 is suitably mounted in bearings 34, 35 and 36 and has fixedly mounted thereon a tight pulley 31 with hand wheel 38 integral therewith and loose pulley 39. On' these pulleys are adapted to be mounted a belt, not shown, for the purpose of driving the shaft I 9.

Conventional bobbin shafts 40 and 4| have intermeshing pinions 42 and 43 thereon. Bobbin shaft 4| has a sprocket 44 thereon. The structure thus far described is conventional and it is with this mechanism that my improved dif- 5 ferential is adapted to be associated and to cooperate therewith for driving the same.

By any suitable means such as set screw 59 there is secured on drive shaft l9 a hub portion 5| which has integral therewith a housing 52 comprising sidewall portions 53 and 54 which are joined together by peripheral end portion 55. sidewall 54 has an opening 56 near the central portion thereof in order to allow air to circulate freely within the housing and through which the gears are inserted and removed while centrifugal force retains the lubricant in the housing. Mounted in sidewalls 53 and 54 are shafts 51 and 58 which in turn have mounted thereon pinions 59 and 60 respectively. Pinions 59 and 60 are disposed on opposed sides of -a sleeve 6| rotatably mounted on main drive shaft I9. It'is to be noted that 'the righthandend of sleeve 6| has a gear 62 cut therein which gear meshes with the pinions 59 and 69. Pinion 59, whichis mounted on shaft51,:has suitable fiber washers 63 and "64 disposed between pinion 59 and 59o'and sidewall :portions 53 and 54, to prevent unnecessary wear and friction. Similar washers 65 and 66 are disposed on opposed sides of pinion 6||6|a for the same purposes. It shouldbe further noted that suitable set screws 51a and 58a are threadably secured in the sidewall portion 54 for-securing shafts 51 and 58 in fixed position within the housing. The left-hand portion of sleeve 6| has fixedly secured thereon a sprocket III by any suitable means such as set screws Sprocket in has mounted thereon, as seen in Figure 1, a suitable 'drive'or' chain 12 which leads downwardly and is mounted'on sprocket 33 mounted onrshaft :32.

' 'Pinio-ns 59 and 6|] have integral therewith smaller pinions 59a and-60a which are disposed .on opposed sides of a gear 13 and mesh therewith and gear 13 has integral therewith a sleeve 14 which is rotatably mounted 'on sleeve 6 I. The left-hand' portion of sleeve "Hhas fixedlysecured thereon a sprocket '|5"b-y any suitable means such as a set screw 16. "The pinion 15, as seen in Figure 1, has mounted thereon a drive or chain 11 which is also mounted on pinion 44 which is in turn fixedly secured on shaft 4|. It

7 should also be noted that sleeve 6| has a spiral groove 6|a cut-on the interior thereof for propelling the oil or greases back into casing or housing 52 which might have a tendency to work out around drive shaft I 9. Another spiral groove 6|b is cut on the exterior of sleeve 6| for pro: pelling the grease back into the casing which might work out between the sleeve 6| and the Figure 2.

a clock-wise direction with the observer standing at the left-hand end of Figure 1 and looking at the end of shaft l9. Therefore, all of the parts as shown in Figure 3 would rotate in a clock-Wise direction, whereas the parts in Figure 4 would appear to operate in a counterclockwise direction since the sectional views 3 and 4 are taken, looking in opposite directions.

The rotation of shaft l9 of course rotates the housing 53 in a clockwise direction looking towards the apparatus from the left-hand end of This has a tendency to rotate the sleeves 6| and 14 also in a clockwise direction together with their sprockets 19 and 15.. Now on the right-hand end of drive shaft l9, as seen in Figure 1, there is a geared connection with cone pulley l4 which drives belt 25 in the direction indicated by the arrow, which is also a clockwise direction. This imparts clockwise rotation to cone 24, which, in turn, imparts clockwise rotation to shaft 32, which, imparts clockwise rotation to belt 12. On account-0 f the shaft 32 being driven'a less number of revolutions per minute, this acts as a'retarder 'on the movement or rotation of belt 12 which gives a differential motion. Therefore, the rotation of sleeve 6| is retarded which slows down the rate of rotation of the double-geared members 59 and 6|] within the casing which likewise retards the speed of rotation of sleeve 14 and its sprocket 15 which gives the desired differential motion to the'second driven shaft 4|. a V

In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being set forth in the appended claim. l V

I claim: a V

A mechanical movement comprising a drive shaft, a differential mechanism mounted on said drive shaft, a ,cone lpulley driven by said drive shaft, a second cone pulley, a belt connection between said pulleys, a shaft driven by said last cone pulley, a second driven shaft, said differential mechanism comprising a housing secured to the drive shaft, a plurality of double-geared pinions rotatably mounted in the housing, a sleeve rotatably mounted on the drive shaft and projecting into the housing and having a gear thereon meshing with a portion of each of said double-geared pinions, a second sleeve rotatably mounted on the first sleeve and projecting into the housing and having a gear thereon meshing with the other portion of said double-geared pinions, a sprocket fixed on the outer end of the first sleeve and having a driving connection with the first-named driven shaft and a sprocket fixed on the outer end of the second sleeve and having driving connections with the second driven shaft.

WALTER c. STEWART. 

